I have problems with a newly installed C280.
Firstly, I have the C2557 code related to the black toner coming up and disappears when a manual add toner is done and then a few days later the code comes back again.The image on a A3 halftone copy at 150 in test mode shows even coverage on the copy.
The fact that it tones up and recovers would suggest that the toner supplying is ok and the fact that this is a new m/c wouldn't point to either drum or dev unit.Does anyone have any ideas?
Also, it has a Finisher F529 installed and this sometimes doesn't stack correctly for stapling, a page maybe about 3 - 4mm out. I have performed the back and side adjusts via service mode and this seems to help a bit but doesn't look like it does very much, any clues on this one.